128028920

素因数分解:

$2^3\times 5^1\times {\mathrm{53}}^1\times {\mathrm{131}}^1\times {\mathrm{461}}^1$

素因数の和:656

約数の個数: 64

約数和(自身を含む): 296382240

約数和(自身を除く): 168353320

約数列:

[1, 2, 4, 5, 8, 10, 20, 40, 53, 106, 131, 212, 262, 265, 424, 461, 524, 530, 655, 922, 1048, 1060, 1310, 1844, 2120, 2305, 2620, 3688, 4610, 5240, 6943, 9220, 13886, 18440, 24433, 27772, 34715, 48866, 55544, 60391, 69430, 97732, 120782, 122165, 138860, 195464, 241564, 244330, 277720, 301955, 483128, 488660, 603910, 977320, 1207820, 2415640, 3200723, 6401446, 12802892, 16003615, 25605784, 32007230, 64014460, 128028920]

約数ペア:

[(1, 128028920), (2, 64014460), (4, 32007230), (5, 25605784), (8, 16003615), (10, 12802892), (20, 6401446), (40, 3200723), (53, 2415640), (106, 1207820), (131, 977320), (212, 603910), (262, 488660), (265, 483128), (424, 301955), (461, 277720), (524, 244330), (530, 241564), (655, 195464), (922, 138860), (1048, 122165), (1060, 120782), (1310, 97732), (1844, 69430), (2120, 60391), (2305, 55544), (2620, 48866), (3688, 34715), (4610, 27772), (5240, 24433), (6943, 18440), (9220, 13886)]